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6
Ethernet Interface
The PPC440GP processor provides an Ethernet interface that supports two 10/
100BaseTX Ethernet ports for the PmPPC440. The interface uses two Broadcom
BCM5221 PHY transceivers to provide two isolated Ethernet ports to the front
panel or two non-isolated ports to the P14 PMC connector.
6.1 BCM5221 Registers
The MII management interface registers are serially written to and read from
using the management data I/O (MDIO) and management data clock (MDC)
pins. The MII register map summary is specified in Table 6-1. When writing to
the reserved bits, ignore the output value. The initialization column is the reset
value of the register.
Table 6-1. BCM5221 MII Register Map Summary
Hex
Address
Name
Initializa-
tion (Hex)
00
Control
3000
01
Status
782D
02
PHYID High
0040
03
PHYID Low
61E4
04
Auto-Negotiation Advertisement
01E1
05
Auto-Negotiation Link Partner Ability
0021
06
Auto-Negotiation Expansion
0004
07
Auto-Negotiation Next Page
2001
08
Auto-Negotiation Link Partner Next Page Transmit
0000
10
100BASE-X Auxiliary Control
0000
11
100BASE-X Auxiliary Status
0001
12
100BASE-X Receive Error Counter
0000
13
100BASE-X False Carrier Sense Counter
0000
14
100BASE-X Disconnect Counter
0200
Summary of Contents for PmPPC440
Page 1: ...PmPPC440 PowerPC Based Processor PMC Module User s Manual April 2005 ...
Page 3: ...PmPPC440 PowerPC Based Processor PMC Module User s Manual April 2005 ...
Page 14: ...viii PmPPC440 Contents ...
Page 34: ...2 14 PmPPC440 Setup April 2005 ...
Page 42: ...3 8 PmPPC440 PPC440GP Processor April 2005 ...
Page 56: ...6 4 PmPPC440 Ethernet Interface April 2005 ...